Flushing-valve for urinals



NITED STATES yllefr1iiv1. OFFICE,

WILLIAM SCOTT, OF MEDFORD, ASSIGNOR TO THE DALTON-INGERSOLL COMPANY, OFBOSTON, MASSACHUSETTS.

FLUSHING-VALVE FOR URINALS.

SPECIFICATIONforming part of Letters Patent No. 533,021, dated January22, 1895. Application led January 2,1894. Serial No. 495,351. (Nomodel.)

To all whom t may concern.-

Be it known that I, WILLIAM SCOTT, of Medford, county of Middlesex,State of Massachusetts, have invented an Improvement in Flushing-Valvesfor Urinals, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

This invention relates to a valve apparatus for iiushing urinals or foranalogous uses, the said apparatus being set in the gor and the valvebeing opened by the Weight of a per` son stepping on a treadle andclosed automatically when the said weight is removed.

The object is to produce a more efficient and durable valve than thoseheretofore used for this purpose, the construction being such that theWorking parts of the valve may be removed for repair or renewal withoutdisturbing the connection of the main valve body with the loor andpiping.

Figure l is a side elevation of the valve apparatus embodying thisinvention, the operating treadle being shown in longitudinal section;Fig. 2, a vertical section of the valve shell and mechanism containedtherein on a larger scale, and Fig. 3 a horizontal sectional detail online x3, Fig. 2.

The working parts of the valve proper are contained in a main shell orcased having inlet and outlet openings a2, d3,for connection with thesupply and delivery pipes b2, h3, and a liange a4 adapted to be let intothe floor A -in which the apparatus is used, and securely fastenedthereto in any suitable manner as by the screws 0,5. The chamber a isopen at the top, and is adapted to receive a tight fitting removablecover owhich as shown in this instance screws into the open end of thecylindrical chamber a closing the same tightly and coming to an evenflush surface with the flange d4 and door surrounding the same so thatthere is no depression to accumulate moisture and filth, the entireupper surface of the valve apparatus except the valve-stem and boxthrough which it works presenting a smooth, even surface which caneasily be kept clean.

The upper end of the inletpassage a2 to the valve chamber is screwthreaded as shown at a7 to receive the valve seat piece and valveproper, that controls the flow of liquid through 'the opening in thesaid seat. The valve seat d is formed in a piece that screws into or isotherwise detachably'secured in the socket a7 and 4is provided in itsupper part with a portion d2 which serves as a cushioning chamber,co-operating with the valve stein to cushion the closing movement ofthevalve. There is a chamber between thevvalve seat and the said cushioningchamber having lateral outlets ports d4 through which the water thatpasses through theopening in the valve seatwhen the valve is open mayIiow freely into the interior of the valve shell a.

The valve proper e is provided with a stem e2 that extends up throughthe cushioning chamber d2 in the internal valve seat piece and alsoextends out through an opening in the cover` a? of the main valvechamber which is preferably provided with a stuffing box a8 to packthestem e2 and prevent escape of the water around the stem from the valveshell a.

The stem e2 is provided with a flange e3 having a loose t in the guidepassage d2 and 'above the same the stem or an enlargement thereof issurrounded byacup shaped Washer or piece ofl yielding packing e4.`

The valve e is pressed upward toward its seat by a stout springf and itis furthermorev so situated that the pressure of water in the supplypipe, tends to retain it seated, it being opened only when there isapositive downward pressure upon the valve stem sufficient to overcomethe force of the spring and pressure of the Water. Such downwardpressure for operating the valve may be derived from a treadle ormovable platform Bsee Fig. 1, preferably pivotally supported at B2 andresting near its free end uponthe portion of the valve stem e thatprojects above the stuffing box c,a in the cover of the valve shell.

' The valve stem e2 is preferably provided with an adjustable bearingpiece shown as a screw e6. that receives the direct pressure'from thetreadle B and byadj usting the said bearing piece or screw upward ordownward the valve c may be caused to open more or less widely by agiven amount of depression of the treadle B. The hinging of the treadleat B2, enables it to be turned upward to aord ac- IOO cess to the oorand top of the valve chamber below for the purpose of cleaning the same.

Then the treadle B is depressed as by a person stepping upon it, thevalve proper e is pressed downward from its seat d and the water liowsfrom the supply pipe b2 through the inlet portion a2 of the valve shelland through the opening in the valve seat and thence out through theports d4 in the valve seat piece above the valve seat to the interior ofthe main valve shell a from which the water flows freely through theoutlet opening a3 to the parts to be flushed or washed. When the valve eis thus opened the water will pass by the flange e3 on the valve sternand the cup leather or washer c4 and till the space in the cushioningchamber cl2 above the said flange and washer which are at this time atsome distance below the top of the chamber d2. As will be readilyunderstood the washer c4 affords practically no resistance to thepassage of the water upward by it but when the weight by which the valvewas opened is removed from the treadle B, and the valve begins to closeunder the action of the spring f, the washer e4 will prevent the passageof water downward past the flange e3 and thus trapping the water in theupper part of the cushionin g chamber d2. The water thus entrapped ispermitted to escape only slowly from this chamber and thus retards theclosing movement of the valve and prevents it from coming to its seatwith a sudden shock, which would produce water hammer in the supply pipeb2. For the purpose of indicating the construction by which thiscushioning effect is produced, the upper end of the chamber d2 is shownin Fig. 2, as provided with a small vent passage d5 to permit the slowescape of water from above the washer e, on the valve stem for thepurpose of retarding and regulating the closing movement of the valve;but in practice it will be unnecessary to provide a special ventpassage, as the leakage around the stem where it passes through the endof the chamber d2 with an ordinary working tit is sufcient to producethe desired cushioning effect.

1f there is occasion to have access tothe working parts of the valve forrepairs or renewal, the cover 0,6 may be removed from the shell a andthe valve seat piece d, cl2, then unscrewed from the socketa7 therebyremoving the valve proper and valve seat and in fact all the workingparts of the valve, leaving only the shell 0. the connection of whichwith the ioor and with the supply and delivery pipes need not bedisturbed. It is therefore possible to repair the valve when necessary,very quickly and at very small cost.

I claiml. The combination of the main shell provided with a removablecover and with inlet and outlet openings, and a valve seat pieceinclosed in and detachably secured to said shell over the inlet openingthereof, anda valve held in operative position by said valve seat pieceand havinga stem working through openings in said valve seat piece andin the cover of said shell, substantially as and for the purposedescribed.

2. The combination of the main shell provided with a removable cover andwith inlet and outlet openings, and a valve seat piece inclosed in anddetachably secured to said shell over the inlet opening thereof, and avalve held in operative position by said valve piece and having a stemworking through openings in said valve seat piece and in the cover ofsaid shell, and a treadle cooperating with the valve-stem outside ofsaid cover, substantially as and for the purpose described. y

3. The combination of the main shell provided with inlet and outletopenings and a detachable cover for said shell, with the valve seatpiece detachably secured over the inlet opening in the interior of saidshell, the valve proper held in operative position by and cooperatingwith the said seat piece, and having a stem extending through the coverof l the main shell, and a spring normally pressing the valve to itsseat, substantially as described.

4. The combination of the main shell provided with inlet and outletopenings and a detachable cover for said shell with the valve seat piecedetachably secured over the inlet opening in the interior of said shell,and provided with a valve seat and a cushioning chamber, and the valveproper held in operative position by and cooperating with the saidseatand havingastein extending through said cushioning chamber and throughthe cover of the main shell, the portion of the shell in the cushioningchamber being provided with a washer to trap the water in the cushioningchamber for the purpose of retarding the closing movement of the valve,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM SCOTT.

lVitnesses:

Jos. P. LIVERMORE, M. E. HILL.

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